| US 7,587,229 B2 | ||
| Superconducting tunable filter having a patch resonator pattern tuned by a variable dielectric constant top plate | ||
| Masatoshi Ishii, Kawasaki (Japan); Kazunori Yamanaka, Kawasaki (Japan); Akihiko Akasegawa, Kawasaki (Japan); John David Baniecki, Kawasaki (Japan); Kazuaki Kurihara, Kawasaki (Japan); and Teru Nakanishi, Kawasaki (Japan) | ||
| Assigned to Fujitsu Limited, Kawasaki (Japan) | ||
| Filed on Mar. 27, 2007, as Appl. No. 11/727,660. | ||
| Claims priority of application No. 2006-095250 (JP), filed on Mar. 30, 2006; and application No. 2006-346212 (JP), filed on Dec. 22, 2006. | ||
| Prior Publication US 2007/0232499 A1, Oct. 04, 2007 | ||
| Int. Cl. H01P 1/203 (2006.01); H01B 12/02 (2006.01) | ||
| U.S. Cl. 505—210 [333/99 S; 333/205] | 16 Claims |
| 1. A superconducting tunable filter comprising:
a dielectric base plate;
a patch-shaped resonator pattern includes a superconducting material disposed on the dielectric base plate;
a top dielectric provided over the resonator pattern, the top dielectric includes a material having a non-linear electric-field
dependency of permittivity;
a conducting pattern disposed on a top face of the top dielectric to produce coupling corresponding to a prescribed bandwidth;
and
a bias voltage supply configured to apply a bias voltage to the top dielectric,
wherein the bias voltage supply includes a first bias application wiring disposed on the dielectric base plate and connected
to the superconducting resonator pattern, and a second bias application wiring disposed on the dielectric base plate and electrically
connected to the conducting pattern on the top dielectric.
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